Pliers



Jan. 11, 1949. ,.v;, PER AN 2,458,725

PLIERS Filed Sept. 14,, 1944 INVENTOR.

\23 gehm x111 ATTORNEY iatented Jan. 11 1949 UNITED STATES PATENT OFFICE PLIERS Glenn W. Periman, Los. Angeles, Calif.

Application September 14, 1944, Serial No. 553,970

My invention relates to pliers and more particularly to such 1 a tool that is adaptable to handling, trimming and'cutting hot plastic material.

It is an important object of the invention to provide such a tool that will'dissipa'te heat transmitted from the hot material to the pliers. The jaws of the pliers are also heated for neat cutting.

Other objects are to provide jaws for the pliers that will progressively pinch off the material from one side to the other, and to provide interchangeable jaws to more conveniently cut off any shape or form.

A further object is to provide a carefully adjustable stop that. may be moved to limit the closing movements of the jaws to determined distances apart. I

My invention also has for its objects to provide such means that are positive in operation, convenient in use, easily operated, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description. However, the drawings merely show and the following description merely describes, one-embodiment of the present invention, which is'given by way of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

Fig. l is a side elevationof pliers embodying the foregoing objects.

Fig. 2 is a front elevation of said pliers, taken at right angles to Fig. 1.

Fig. 3 is a section taken on the line 3--3 of Fig.

Fig. 4 is an end View taken on the line 44 of Fig. 2, in Fig. 2 looking in the direction of the arrows.

Fig. 5 is a section taken on the line 5--5 of Fig. 1 and Fig. 6 is an enlarged section taken on 66 of Fig. 2.

Referring more in detail to the drawings, the reference numbers 6 and l designate the handles coveredwith insulating material, as probably best suggested'in Fig. 3. The handles are referably shaped as shown in the drawings, to conveniently fit the hand of the user. The backs of the handles carry fins 36 projecting outwardly therefrom and progressively increasing in length toward the gripping portion of the handles, progressively to increase the radiation therefrom. The fins inthe line 6 Claims.

crease in outward extent from the one next the jaws toward the handles. Thickened fins 31 and 38 are arranged at opposite ends of the fin group to protect them from being broken off.

Shoulder member 8 and 9 are respectively connected with the handles 6 and 1 on the opposite side of the pivot bolt 10. The shoulder members 8 and 9 have dove-tailed faces l2 and I 3 respectively, that fit in correspodingly shaped dovetailed grooves in jaw'members I4 and IS. The jaw members l4 and I5 are tapered at their ends, as shown at [6 and I1, and on their sides, as sug gested at l8. Screws [9 and 20 respectively maintain the jaws l4 and I5 in their interlocked positions upon the shoulder members 8 and 9.

Means to limit the closing movements of the pliers comprises a block 2| slidable in a wedgeshaped groove 22 on'the inner face of the handle 6. The block 2] has a'similarly shaped wedgeshaped base 23 slidable in the groove 22. It will be noted that the bottom of the groove 22 and the opposed inner face 35 of the handle 1 converge to provide operating faces for the block 2|. Actuating means for the block 2| consists of a bolt 24 mounted in a relatively fixed boss 25 also on the inner face of the handle 6. A snap ring 26 engages a circumferential groove 2'! around the bolt 24 and a therewith opposed and comple- .mentary groove 'in the block, to prevent the removal of the bolt 24 after the ring 26 has snapped into place.'

After the pliers have been moved to the most nearly closed position, determined by the block 2|, a coil spring 28 tends to move the handles to an open position. 'The spring 28 is coiled around a'pin 29 that'is screwed into one of the handles, e. g.', handle 6, and projects into a socket 30 in the other handle, to-wit, the handle I. A look nut 3| fastens the pin 29 in position. The spring 28 is disposed between the lock nut and the opposed face of the other handle. The adjacent end of the spring 28 may be spot welded. to the lock nut 3| to prevent its falling from the pin 29, when the handles are apart.

It will be noted that the opposed faces 32 and 33 of the jaws l4 and I5 respectively, are not parallel. The purpose of this provision is to squeeze off. surplus material when using the plier with hotsubstances, as plastics; erable that these faces diverge outwardly from an abutting line 34 along one side of the jaws, when the jaws touch. Of course, if the wedge block 2| is moved further inward with respect to the angle between the handles, the jaws l4 and It is prefv 15 will not touch even in their most nearly closing position.

In the use of my present pliers, they may be effectively used to handle, trim, cut, hold and bend work material, such as hot, bendable plastic. The fins 36 aid in radiating heat from the pliers into the surrounding atmosphere. The insulation on the handles 6 and I prevents heat that is not thus radiated, from burning the user's hands.

The purpose of having'the block 21' prevent the pliers from entirely closing, is to avoid cutting entirely through soft, heated plastic material;

The block 2! determines the limit of the closing movement of the pliers.

The coil spring 28 is compressed-W non the handles are moved towardseach rother -thereby aiding in separating the handles and opening the jaws when the handles are released. The =const'ruction of the jaws, heretofore described, permits their ready.interchangeability. The dovee tailed connection: between? the jaws and the: shoulder-s10 and fifimakes-afirm connection for" the jaws with:the' s'houlders; but-atthe same time; permits "ready removabilityby unscrewing the screws!!! and Zllrand slidingithe jawsup the incline providediby-th'e faces I2 and I3. Other shapes "of jaws having: the present connecting means maybaeasily:substituted for those shown:

Since'the jaws are intenchan'geable, it is. to be understood, that=vario11s shap'es-of jaws. maybe employed, suchi'as. curved, .right angle, round,

squareor any other desired shape to conven-- iently-trim castings.

While I, have illustrated and described: whatnow regard; as-the -preferred.embodiment --of my invent-ion, the construction is; of course, subject to modifications without departing" from, the

spirit and. scope -of.-l.my invention.* I,..theref.0re,"

do not wish to restrict myself to theparticular form '05 construction illustratedand described,

but desire: to avail-myselfof .allmodificati-ons.

that may fall within-:therscope of. theappended claims.

Havingthus descnibedmy, invention, what I claim and. desire-to. secureby .Letters Patent is:

l. Inv pliers, handle andtjawmembers pivoted. to .eachother, means .to.-prevent the jaw members from coming together com-prising a slidingblock, the ha-ndle.:members. having convergin faces upon one of which the block is slidable ando to. which; it. is connected .andthe other of .which the .block.engagesinitsiadjustedpositions, a boss jaw members frommomingtogether, said block being slidablyconnected to oriefiofsa'id handle members, a'boss on-said handle member and screw means connected to said bossto adjust said block relative to the other handle memberto maintain the-jaw members difierent distances apart.

3." In pliers; handle and 'jaw members pivoted to each other, one of said handle. members having a dove-tail groove, means to prevent the jaw members from coming together comprising a sliding block having a dove-tail connection with the groove of said member and arranged to contact an opposed face of the other member, said opposed face converging with respect to the bottom of the groove, and screw means mounted upon the member carrying the block and connected thereto to move the block in opposite directions 'and tomaintain the *block'in its adjusted positions.

4. In pliers, handle and jaw members pivoted toeach other, and cooling fins on each of said handle members near the pivot thereof and between the pivot and the portion of the handle gripped by the user, to radiate heat tending to be conveyed from the jaws to the handles said fins progressively increasing in length toward the gripping portion of the handles, progressively to increase the radiation therefrom.

512111" p1iers,- handle. and jaw members-pivoted to eachother, and cooling fins on the back of each. handle, betweennthe pivot and the-portion of the handle gripped by the user, the fins inr creasing insize'from'the onenearest the pivot toward the gripping'portions of thehandle, and thickened-, stronger fins at the-ends of the series arranged to protect the other fins.

6. In a 'deviceof the-character referred to,the combination of: handle'members pivoted to each other intermediate their ends and provided with jaws at. one 'endi thereof, said -jaws-having substantially rectangular faces opposing each other and disposedin inclined relation 'withrespect to each other to provide agrippingarea at one side thereof and a progressivesqueezingarea atanother side thereof a block longitudinally and slidab-lyi-mounte'd on one handle member opposite the second handle member and engaging the other handle member, and means-adjustab1y mounted on said firstjhandleimember and re volubly connected with the-block tolimit'the inward" movement of-thc-=handle members and consequently ofthe jaws.

GLENN W. PERIMAN;

REFERENCES. CITED The following 'references are of recordin'the are of'flthis patenti UNITED STATES PATENTS Number- Name Date 419,270 Low Jan. 14, 1890 699,832 Broadbooks May 13, 1902 844,134, Jenkins Feb. 12, 1907 1,034,947 Alvord Aug. 6, 1912 1,505,510 Uhl Aug. 19, 1924 1,508,687 Gilley Sept. 16, 1924' 1,620,706 Welsh Mar. 15, 1927 1,623,130 Otis Apr. 5, 1927 1,892,082 Shekerjian Dec. 27, 1932 1,988,827. Bennett" Jan. 22, 1935 1,993,781 Hampton Mar. 12, 1,935" 2,001,538 Muel1erh May l l, 1935 2,067,230 Bowers Jan; 1'2,: 1937 FOREIGNPATENTS Number Country Date 47,615 Germany July 3, 1889 515,205 France Nov. 22,1920 

